#include <stdio.h>

#define LOWER	0		/* lower limit in units of fahrenheit */
#define UPPER	300		/* upper limit in units of fahrenheit */
#define STEP	20		/* step size, 20 gives 300/20 + 1 = 16 different temperatures */

/* Simple function that prints a conversion table for celcius <-> fahrenheit */

main()
{
	int fahr;

	printf("Fahrenheit \t Celcius\n");

	for (fahr = LOWER; fahr <= UPPER; fahr = fahr + STEP) {
   	printf("%10d \t %7.1f\n", fahr, 5/9. * (fahr-32));
	}
}